Laser powder bed fused 304L steel shot-peened with various ceramic shot sizes: Surface/subsurface characteristics, tensile behavior, and fatigue behavior

doi:10.1016/j.ijplas.2023.103784

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Laser powder bed fused 304L steel shot-peened with various ceramic shot sizes: Surface/subsurface characteristics, tensile behavior, and fatigue behavior
	Zhang, Hongzhuang 2; Cao, Shujie 2; Li, Changyou 2; Li, Bing 2; Qian, Guian 1
刊名	INTERNATIONAL JOURNAL OF PLASTICITY
	2023-12-01
卷号	171 页码:21
关键词	Laser powder bed fusion Shot peening Shot size Microstructural evolution Strengthening mechanism
ISSN号	0749-6419
DOI	10.1016/j.ijplas.2023.103784
通讯作者	Li, Changyou(chyli@mail.neu.edu.cn) ; Qian, Guian(qianguian@imech.ac.cn)
英文摘要	Shot peening is an efficient post-processing technique for eliminating surface manufacturing defects, inducing compressive residual stress, and improving the mechanical properties of laser powder bed fused (L-PBFed) metallic materials. With a series of microstructural characterizations, this work comprehensively evaluated the influence of ceramic shot size on the surface characteristics, subsurface characteristics, and mechanical properties, especially fatigue performance, of L-PBF manufactured 304L austenitic stainless steel (SS). The mechanical testing process was in situ observed using an infrared thermal camera, and the tensile-fractured and fatigue-fractured microstructures were systematically examined, aiming to explore the life improvement mechanisms caused by different ceramic shot sizes. The results revealed that when compared to small sized AZB 100 shots, the large-sized AZB 300 shots could result in higher surface roughness, larger thickness reduction, more apparent surface gradient structure, higher strength, and longer fatigue lifetimes. The strength improvement could be associated with the size reduction of L-PBF induced subsurface defects, the grain refinement at the surface layer, and the alpha'-martensitic transformation during tensile deformation. The life improvement could be primarily attributed to the subsurface defect strengthening, which resulted in the fatigue crack initiation transition from subsurface defects to surface defects. During the fatigue process, the energy dissipation originating from the core materials dominated the thermal equilibrium temperature, whereas the density of micro-defects (crystalline defects) at the surface layer dominated the crack tip temperature. These findings provide a basic understanding of how to advance the shot peening process for L-PBFed materials.
资助项目	Opening fund of State Key Laboratory of Nonlinear Mechanics ; National Natural Science Foundation of China[12272090] ; Fundamental Research Funds for the Central Universities[N2203002] ; Fundamental Research Funds for the Central Universities[N2003006]
WOS关键词	MECHANICAL-PROPERTIES ; STAINLESS-STEEL ; HEAT-TREATMENT ; AL-ALLOY ; STRENGTH ; EVOLUTION ; DUCTILITY ; MICROSTRUCTURE ; PERFORMANCE ; RESISTANCE
WOS研究方向	Engineering ; Materials Science ; Mechanics
语种	英语
WOS记录号	WOS:001107017500001
资助机构	Opening fund of State Key Laboratory of Nonlinear Mechanics ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/93511]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Li, Changyou; Qian, Guian
作者单位	1.Chinese Acad Sci, State Key Lab Nonlinear Mech LNM, Inst Mech, Beijing 100190, Peoples R China 2.Northeastern Univ, Sch Mech Engn & Automation, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Hongzhuang,Cao, Shujie,Li, Changyou,et al. Laser powder bed fused 304L steel shot-peened with various ceramic shot sizes: Surface/subsurface characteristics, tensile behavior, and fatigue behavior[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2023,171:21.
APA	Zhang, Hongzhuang,Cao, Shujie,Li, Changyou,Li, Bing,&Qian, Guian.(2023).Laser powder bed fused 304L steel shot-peened with various ceramic shot sizes: Surface/subsurface characteristics, tensile behavior, and fatigue behavior.INTERNATIONAL JOURNAL OF PLASTICITY,171,21.
MLA	Zhang, Hongzhuang,et al."Laser powder bed fused 304L steel shot-peened with various ceramic shot sizes: Surface/subsurface characteristics, tensile behavior, and fatigue behavior".INTERNATIONAL JOURNAL OF PLASTICITY 171(2023):21.